Table 2.
Retzius periodicity in great apes
| Species | RP in days | |||||||
|---|---|---|---|---|---|---|---|---|
| 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | |
| Deciduous | ||||||||
| Pan troglodytes | 1 | 1a | ||||||
| Gorilla gorilla | 1 | |||||||
| Pongo pygmaeus | 1 | |||||||
| Permanent | ||||||||
| Pan troglodytes | 1 | 4 | 2 | 1 | ||||
| Gorilla gorilla | 5 | 1 | ||||||
| Pongo pygmaeus | 3 | 1b | ||||||
a
The RP of this lower deciduous canine was either 5 or 6 days.
b
The RP calculated in the lateral enamel of the mesio‐buccal cusp of this premolar was 12 days. When the analysis was repeated in the mesio‐lingual cusp lateral enamel of the premolar it gave an RP of 12 days.